dm: mmc: Add a way to use driver model for MMC operations

The driver model conversion for MMC has moved in small steps. The first step
was to have an MMC device (CONFIG_DM_MMC). The second was to use a child
block device (CONFIG_BLK). The final one is to use driver model for MMC
operations (CONFIG_DM_MMC_OP). Add support for this.

The immediate priority is to make all boards that use DM_MMC also use those
other two options. This will allow them to be removed.

Signed-off-by: Simon Glass <sjg@chromium.org>

3 files changed, 93 insertions, 3 deletions

diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index c80efc3..b9662f9 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -16,6 +16,15 @@ config DM_MMC
 	  appear as block devices in U-Boot and can support filesystems such
 	  as EXT4 and FAT.
 
+config DM_MMC_OPS
+	bool "Support MMC controller operations using Driver Model"
+	depends on DM_MMC
+	help
+	  Driver model provides a means of supporting device operations. This
+	  option moves MMC operations under the control of driver model. The
+	  option will be removed as soon as all DM_MMC drivers use it, as it
+	  will the only supported behaviour.
+
 config MSM_SDHCI
 	bool "Qualcomm SDHCI controller"
 	depends on DM_MMC
diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
index 530276a..38ced41 100644
--- a/drivers/mmc/mmc-uclass.c
+++ b/drivers/mmc/mmc-uclass.c
@@ -13,6 +13,72 @@
 #include <dm/root.h>
 #include "mmc_private.h"
 
+#ifdef CONFIG_DM_MMC_OPS
+int dm_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
+		    struct mmc_data *data)
+{
+	struct mmc *mmc = mmc_get_mmc_dev(dev);
+	struct dm_mmc_ops *ops = mmc_get_ops(dev);
+	int ret;
+
+	mmmc_trace_before_send(mmc, cmd);
+	if (ops->send_cmd)
+		ret = ops->send_cmd(dev, cmd, data);
+	else
+		ret = -ENOSYS;
+	mmmc_trace_after_send(mmc, cmd, ret);
+
+	return ret;
+}
+
+int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
+{
+	return dm_mmc_send_cmd(mmc->dev, cmd, data);
+}
+
+int dm_mmc_set_ios(struct udevice *dev)
+{
+	struct dm_mmc_ops *ops = mmc_get_ops(dev);
+
+	if (!ops->set_ios)
+		return -ENOSYS;
+	return ops->set_ios(dev);
+}
+
+int mmc_set_ios(struct mmc *mmc)
+{
+	return dm_mmc_set_ios(mmc->dev);
+}
+
+int dm_mmc_get_wp(struct udevice *dev)
+{
+	struct dm_mmc_ops *ops = mmc_get_ops(dev);
+
+	if (!ops->get_wp)
+		return -ENOSYS;
+	return ops->get_wp(dev);
+}
+
+int mmc_getwp(struct mmc *mmc)
+{
+	return dm_mmc_get_wp(mmc->dev);
+}
+
+int dm_mmc_get_cd(struct udevice *dev)
+{
+	struct dm_mmc_ops *ops = mmc_get_ops(dev);
+
+	if (!ops->get_cd)
+		return -ENOSYS;
+	return ops->get_cd(dev);
+}
+
+int mmc_getcd(struct mmc *mmc)
+{
+	return dm_mmc_get_cd(mmc->dev);
+}
+#endif
+
 struct mmc *mmc_get_mmc_dev(struct udevice *dev)
 {
 	struct mmc_uclass_priv *upriv;
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index afb11b9..f8e5f7a 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -21,6 +21,7 @@
 #include <div64.h>
 #include "mmc_private.h"
 
+#ifndef CONFIG_DM_MMC_OPS
 __weak int board_mmc_getwp(struct mmc *mmc)
 {
 	return -1;
@@ -46,6 +47,7 @@ __weak int board_mmc_getcd(struct mmc *mmc)
 {
 	return -1;
 }
+#endif
 
 #ifdef CONFIG_MMC_TRACE
 void mmmc_trace_before_send(struct mmc *mmc, struct mmc_cmd *cmd)
@@ -115,6 +117,7 @@ void mmc_trace_state(struct mmc *mmc, struct mmc_cmd *cmd)
 }
 #endif
 
+#ifndef CONFIG_DM_MMC_OPS
 int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 {
 	int ret;
@@ -125,6 +128,7 @@ int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 
 	return ret;
 }
+#endif
 
 int mmc_send_status(struct mmc *mmc, int timeout)
 {
@@ -789,6 +793,7 @@ int mmc_hwpart_config(struct mmc *mmc,
 	return 0;
 }
 
+#ifndef CONFIG_DM_MMC_OPS
 int mmc_getcd(struct mmc *mmc)
 {
 	int cd;
@@ -804,6 +809,7 @@ int mmc_getcd(struct mmc *mmc)
 
 	return cd;
 }
+#endif
 
 static int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
 {
@@ -967,11 +973,13 @@ static const u8 multipliers[] = {
 	80,
 };
 
+#ifndef CONFIG_DM_MMC_OPS
 static void mmc_set_ios(struct mmc *mmc)
 {
 	if (mmc->cfg->ops->set_ios)
 		mmc->cfg->ops->set_ios(mmc);
 }
+#endif
 
 void mmc_set_clock(struct mmc *mmc, uint clock)
 {
@@ -1505,10 +1513,15 @@ __weak void board_mmc_power_init(void)
 
 int mmc_start_init(struct mmc *mmc)
 {
+	bool no_card;
 	int err;
 
 	/* we pretend there's no card when init is NULL */
-	if (mmc_getcd(mmc) == 0 || mmc->cfg->ops->init == NULL) {
+	no_card = mmc_getcd(mmc) == 0;
+#ifndef CONFIG_DM_MMC_OPS
+	no_card = no_card || (mmc->cfg->ops->init == NULL);
+#endif
+	if (no_card) {
 		mmc->has_init = 0;
 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 		printf("MMC: no card present\n");
@@ -1524,12 +1537,14 @@ int mmc_start_init(struct mmc *mmc)
 #endif
 	board_mmc_power_init();
 
+#ifdef CONFIG_DM_MMC_OPS
+	/* The device has already been probed ready for use */
+#else
 	/* made sure it's not NULL earlier */
 	err = mmc->cfg->ops->init(mmc);
-
 	if (err)
 		return err;
-
+#endif
 	mmc->ddr_mode = 0;
 	mmc_set_bus_width(mmc, 1);
 	mmc_set_clock(mmc, 1);